ios A highly sensitive and selective fluorescent biosensor for breast cancer derived exosomes using click reaction of azide–CD63 aptamer and alkyne-polymer dots By pubs.rsc.org Published On :: Anal. Methods, 2024, Advance ArticleDOI: 10.1039/D4AY00146J, PaperDumei Ma, Yiting Luo, Xiaoya Zhang, Zehu Xie, Yinghua Yan, Chuan-Fan DingA fluorescence method based on Cu-triggered click reaction of azide modified CD63 aptamer and alkyne capped Pdots was developed for breast cancer derived exosome detection.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Electroanalysis overview: additive manufactured biosensors using fused filament fabrication By pubs.rsc.org Published On :: Anal. Methods, 2024, Advance ArticleDOI: 10.1039/D4AY00278D, Minireview Open Access   This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Robert D. Crapnell, Craig E. BanksAdditive manufacturing (3D-printing), in particular fused filament fabrication, presents a paradigm shift in the way electrochemical based biosensing platforms are produced, giving rise to a new generation of personalized and on-demand biosensors.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Symbiosis launches dual degree MBA in partnership with Macquarie University and Aston University By www.thehindu.com Published On :: Thu, 24 Oct 2024 18:55:30 +0530 Full Article Education
ios Nickel-catalysed enantioselective cross-electrophile coupling reaction with the retention of the β-fluorine atom By pubs.rsc.org Published On :: Org. Chem. Front., 2024, 11,6459-6469DOI: 10.1039/D4QO01555J, Research ArticleXin-Yi Shi, Xueyuan Yan, Xiaodong Tang, Shi-Jing Zhai, Genping Huang, Jun-An Ma, Fa-Guang ZhangA nickel-catalysed enantioselective reductive cross-coupling reaction of a new monofluoromethyl building block with acid chlorides is developed to give chiral α-monofluoromethyl acyloin derivatives.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Cobalt-catalyzed enantioselective reductive addition of ketimine with cyclopropyl chloride to construct chiral amino esters bearing cyclopropyl fragments By pubs.rsc.org Published On :: Org. Chem. Front., 2024, 11,6311-6318DOI: 10.1039/D4QO01474J, Research ArticleJiangtao Hu, Tingting Xia, Xianqing Wu, Hongrui Feng, Jingping Qu, Yifeng ChenCo-catalyzed asymmetric reductive addition of ketimine with cyclopropyl chloride has been realized to access diverse chiral amino esters bearing cyclopropyl fragments with broad functional group tolerance and excellent enantioselectivities.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Enantioselective Addition of 3-hydroxyquinolin-2(1H)-one to Isatin and Pyrazole-4,5-dione Derived Ketimines By pubs.rsc.org Published On :: Org. Chem. Front., 2024, Accepted ManuscriptDOI: 10.1039/D4QO01895H, Research ArticleYue Wei, Guishun Bai, Jiamin Wu, Yi Hua, Tao Zhang, Congyong Yue, Hong Wang, Xiaoze BaoThe enantioselective reactivity of 3-hydroxyquinolin-2(1H)-ones was developed through their addition to isatin and pyrazole-4,5-dione derived ketimines, affording novel architectures featuring multiple natural products scaffolds in high yield with excellent enantioselectivities....The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Iridium-catalyzed asymmetric cascade allylation/lactonization of methyl salicylates: enantioselective construction of chiral benzodioxepinones By pubs.rsc.org Published On :: Org. Chem. Front., 2024, Advance ArticleDOI: 10.1039/D4QO01771D, Research ArticleBendu Pan, Yunru Wu, Yaqi Zhang, Xiaobo He, Long Jiang, Liqin QiuAn efficient asymmetric cascade allylation/lactonization of methyl salicylates is achieved. The utilization of chiral-bridged biphenyl phosphoramidite ligand resulted in good results for the construction of a wide range of chiral benzodioxepinones.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Magic effect of diphenylprolinol silyl ether for the enantioselective allenation of 2-alkynals By pubs.rsc.org Published On :: Org. Chem. Front., 2024, Advance ArticleDOI: 10.1039/D4QO00984C, Research ArticleGuolin Wu, Zhen Liu, Shiwen Fan, Wenyao Li, Xue Zhang, Hui Qian, Shengming MaChiral diphenylprolinol silyl ethers have been successfully identified for the enantioselective allenation reaction of terminal alkynes and 2-alkynals, delivering a diverse set of chiral allenynes with high efficiency.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Mechanism and origins of regioselectivity of selenium-catalyzed allylic amination reactions By pubs.rsc.org Published On :: Org. Chem. Front., 2024, Advance ArticleDOI: 10.1039/D4QO01794C, Research ArticleXiaoxiao Hu, Dengmengfei Xiao, Yu Chen, Yi Lu, Zhihan Zhang, Peiyuan YuThe mechanism of selenium-catalyzed allylic amination reactions with different ligands has been explored using density functional theory calculations.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Investigation of the titanium-mediated catalytic enantioselective oxidation of aryl benzyl sulfides containing heterocyclic groups By pubs.rsc.org Published On :: RSC Adv., 2024, 14,35105-35113DOI: 10.1039/D4RA07088G, Paper Open Access   This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Maria Annunziata M. Capozzi, Angel Alvarez-Larena, Joan F. Piniella Febrer, Cosimo CardellicchioEnantiopure benzyl heteroaryl sulfoxides were obtained by asymmetric oxidation. However, two benzimidazolyl sulfoxides were found to be conglomerates.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Reaction of unsymmetrical α-bromo-1,3-diketones with N-substituted thioureas: regioselective access to 2-(N-arylamino)-5-acyl-4-methylthiazoles and/or rearranged 2-(N-acylimino)-3-N-aryl-4-methylthiazoles By pubs.rsc.org Published On :: RSC Adv., 2024, 14,35585-35600DOI: 10.1039/D4RA05436A, Paper Open Access   This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Ranjana Aggarwal, Shilpa Sharma, Naman Jain, Dionisia Sanz, Rosa M. Claramunt, Patricia Delgado, M. Carmen TorralbaHantzsch's [3 + 2] cyclic condensation of α-bromo-1,3-diketones with N-substituted thioureas.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios The role of gold in diversified commodity portfolios By www.thehindubusinessline.com Published On :: Sun, 22 Sep 2024 09:00:00 +0530 It serves multiple purposes as it acts as a hedge against inflation and provides stability during economic downturns Full Article Gold & Silver
ios Biosphere Reserves By www.berkshirepublishing.com Published On :: Mon, 28 Jun 2021 15:15:32 +0000 Abstract: UNESCO Biosphere Reserves were first established under the Man and Biosphere Programme of UNESCO in the 1970s. Their mandate has expanded beyond conservation to include sustainable development and local capacity enhancement. As institutions under UNESCO, they also work on “building peace” by seeking to reconcile relations between peoples, and between people and the The post Biosphere Reserves appeared first on Berkshire Publishing. Full Article Encyclopedia of Sustainability Advance Articles
ios Hydrate of neutral iron(III) complex based on pyruvic acid thiosemicarbazone ligand with abrupt spin-crossover with T1/2=340 K and wide hysteresis loop of 45 K By pubs.rsc.org Published On :: Dalton Trans., 2024, Accepted ManuscriptDOI: 10.1039/D4DT02901A, PaperMaxim Andreevich Blagov, Alexander V. Akimov, Anatoly S Lobach, Leokadiya Zorina, Sergey Simonov, Konstantin Zakharov, Alexander Vasiliev, Natalia SpitsynaThe hydrate of neutral iron(III) complex based on pyruvic acid thiosemicarbazone ligand [FeIII(Hthpy)(thpy)]·H2O (1) was synthesized and characterized using FT-IR spectroscopy, powder and single-crystal X-ray diffraction, dc magnetic measurements, EPR...The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Effect of mono- and dinuclear thiosemicarbazone platinacycles in the proliferation of a colorectal carcinoma cell line By pubs.rsc.org Published On :: Dalton Trans., 2024, 53,17803-17818DOI: 10.1039/D4DT01490A, Paper Open Access   This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Francisco Reigosa-Chamorro, Sandra Cordeiro, M. Teresa Pereira, Beatriz Filipe, Pedro V. Baptista, Alexandra R. Fernandes, José M. VilaThe study of the antiproliferative activity of thiosemicarbazone platinacycles puts forward their high selectivity and low IC50 values.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios A mechanistic study of chiral manganese porphyrin-catalyzed enantioselective C–H hydroxylation reaction By pubs.rsc.org Published On :: Dalton Trans., 2024, Advance ArticleDOI: 10.1039/D4DT02452D, PaperJing-Kun Gao, Wandong Chen, Junjie Tai, Zhengwei Chen, Hang Liu, Yuxin Du, Yiting Jiang, Yuanbin She, Yun-Fang YangThis study uses DFT to explain the enantioselectivity of C–H hydroxylation by a chiral manganese porphyrin. A two-point hydrogen bonding favors pro-(S) C–H bond abstraction by 1.9 kcal mol−1, leading to (S)-hydroxylated products.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Fear or knowledge the impact of graphic cigarette warnings on tobacco product choices [electronic resource] / Donald S. Kenkel, Alan D. Mathios, Grace N. Phillips, Revathy Suryanarayana, Hua Wang, Sen Zeng By darius.uleth.ca Published On :: Cambridge, MA. : National Bureau of Economic Research, 2023 Full Article
ios Nobel laureate Geim urges young scientists to embrace curiosity and break routine By www.thehindubusinessline.com Published On :: Sun, 15 Sep 2024 12:21:05 +0530 Prof Geim addressed the 15th Convocation of Hindustan Institute of Technology and Science (HITS). Full Article Education
ios Merging inline crystallization and pulsed flow operation to enable enantiospecific solid state photodecarbonylation By pubs.rsc.org Published On :: React. Chem. Eng., 2024, Advance ArticleDOI: 10.1039/D4RE00058G, Paper Open Access   This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Bavo Vandekerckhove, Bart Ruttens, Bert Metten, Christian V. Stevens, Thomas S. A. HeugebaertPhotoelimination of α-chiral ketones in the solid state results in highly regio- and enantiospecific C–C bond formation. By combining inline crystallisation and pulsatile flow, the photochemistry of these slurries can now be run fully continuously.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Galacto-oligosaccharides regulates intestinal mucosal sialylation to counteract antibiotic-induced mucin dysbiosis By pubs.rsc.org Published On :: Food Funct., 2024, Accepted ManuscriptDOI: 10.1039/D4FO04626A, PaperLaipeng Xu, Xuan Li, Shuibing Han, Chunlong Mu, Wei-Yun ZhuIntestinal mucin offers a physical barrier to maintain host-commensal homeostasis. Glycosylation is essential for appropriate function of mucin. Galacto-oligosaccharides (GOS) have been used as a prebiotic with proved intestinal benefits,...The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Directed evolution of C-methyltransferase PsmD for enantioselective pyrroloindole derivative production By pubs.rsc.org Published On :: Catal. Sci. Technol., 2024, 14,6298-6306DOI: 10.1039/D4CY00657G, Paper Open Access   This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Diana A. Amariei, Julia Tenhaef, Thomas Classen, Benoit David, Tobias M. Rosch, Holger Gohlke, Stephan Noack, Jörg PietruszkaThe engineering of stereoselective C-methyltransferase PsmD through saturation mutagenesis led to improved activity for larger substrates. An automated process was designed and successfully applied for the mutant library production and screening.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios All-in-one Rh(III)-covalent organic framework for sustainable and regioselective C(sp2)–H bond functionalization By pubs.rsc.org Published On :: Catal. Sci. Technol., 2024, Advance ArticleDOI: 10.1039/D4CY01098A, PaperLuohe Wang, Junnan E, Xiubin Bu, Jing Zeng, Xiaobo Yang, Hua Fu, Zhen ZhaoRhCOF-SYNU-1 serves as a transition-metal catalyst, photocatalyst, and metal ligand, enabling regioselective C(sp2)–H bond functionalization and offering a sustainable approach for Rh(III) catalysis.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Aptamer-functionalized Nucleic Acid Nanotechnology for Biosensing, Bioimaging and Cancer Therapy By pubs.rsc.org Published On :: Nanoscale, 2024, Accepted ManuscriptDOI: 10.1039/D4NR04360J, Review ArticleXiaofang Zheng, Zhiyong Huang, Qiang Zhang, Guoli Li, Minghui Song, Ruizi PengNucleic acids have enabled to fabricate self-assemblies and perform dynamic operations. Among different functional nucleic acids, aptamers can specifically bind to wide range of targets including proteins, viral antigens, living...The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Reply To: [Solved] Full Page Backgrounds on iOS (background-size: cover) By css-tricks.com Published On :: Sun, 19 Jan 2020 15:51:01 +0000 Hi. @brandonmcconnell A few years ago now but any chance you could elucidate how to implement your solution on a WordPress site to someone in the self-taught hack category? e.g. where would you put that code: function.php, style.php etc? Can’t believe this problem existed the first place! Many thanks Full Article
ios iOS 18 to support more Indian languages than ever By www.thehindubusinessline.com Published On :: Wed, 03 Jul 2024 21:34:15 +0530 Users will be able to customise the time on the lock screen with Indian numerals from 12 languages Full Article Technophile
ios Biblia. Concordantiae in eadem, ex tum Veteri, tum Nouo Testamento, sacrisq[ue] canonibus: necnon & ex uiginti Iosephi De antiquitatibus, & Bello Iudaico libris excerptae. Annotationes ex sacris scriptoribus sumptae, & suis quaeq[ue] locis, &a By encore.st-andrews.ac.uk Published On :: Lugduni : apud Hugonem à Porta, M. D. X L VI. [1546] Full Article
ios Google rolls out iOS 16 lock screen widgets By www.thehindubusinessline.com Published On :: Wed, 05 Oct 2022 14:40:43 +0530 Google has new widgets for Gmail and Google News app on iOS 16 Full Article Mobiles & Tablets
ios Apple releases iOS 16.1.1. Here’s how to download By www.thehindubusinessline.com Published On :: Thu, 10 Nov 2022 13:58:27 +0530 6 steps to download iOS 16 updates Full Article How-To
ios Apple: Rapid security response test on iOS 16.2 beta By www.thehindubusinessline.com Published On :: Wed, 23 Nov 2022 18:57:03 +0530 Settings has an option to remove the Apple iOS ‘security response’ Full Article Mobiles & Tablets
ios How to send voice messages on iPhone iOS 16 By www.thehindubusinessline.com Published On :: Wed, 23 Nov 2022 19:01:55 +0530 A few changes have showed up with the iOS 16 update on iMessage Full Article How-To
ios Apple iOS 16.2 brings 5G network support to India By www.thehindubusinessline.com Published On :: Wed, 14 Dec 2022 11:55:32 +0530 Apple iOS 16.2 brings end-to-end encryption for iCloud data, advanced data protection, and others Full Article Mobiles & Tablets
ios New Apple Intelligence features to come on October 28 with iOS 18.1 update: Report By www.thehindu.com Published On :: Tue, 08 Oct 2024 11:17:06 +0530 There are still more AI features to come, like the ChatGPT-powered Siri, Genmoji, and Visual Intelligence, which will mostly be a part of the iOS 19 update Full Article Technology
ios Apple’s iOS 18.2 beta includes new Apple Intelligence features, ChatGPT integration By www.thehindu.com Published On :: Thu, 24 Oct 2024 11:51:10 +0530 Next week, the hardware company is set to release iOS 18.1 which will include the first set of Apple Intelligence features Full Article Technology
ios iOS 18.2 beta 2 available to developers By www.thehindu.com Published On :: Tue, 05 Nov 2024 12:15:18 +0530 The iOS 18.1 beta 1 update added ChatGPT integration with Siri, the iOS 18.2 beta 2 update will let developers subscribe to ChatGPT Plus directly from Settings Full Article Technology
ios Google to launch standalone Gemini app for iOS: Report By www.thehindu.com Published On :: Tue, 12 Nov 2024 11:33:20 +0530 Users will also be able to use Gemini Live through the app which can’t be done through the Google app Full Article Technology
ios Lilly boosts immunotherapy pipeline with Armo BioSciences acquisition By cen.acs.org Published On :: 11 May 2018 00:22:45 +0000 The drug company will pay $1.6 billion to gain Armo’s IL-10 program Full Article
ios Swallowable biosensor dispatches data from pigs’ bellies By cen.acs.org Published On :: 28 May 2018 05:00:02 +0000 Bioluminscent bacteria pair with electronics to detect blood in the gut Full Article
ios DuPont biosciences headquarters debuts By cen.acs.org Published On :: 17 Jun 2018 11:17:56 +0000 Full Article
ios Precision BioSciences raises $110 million for off-the-shelf CAR-T and gene-edited crops By cen.acs.org Published On :: 08 Jul 2018 13:00:02 +0000 Full Article
ios Gingko Bioworks launches biosecurity initiative By cen.acs.org Published On :: 08 Jul 2018 13:04:02 +0000 Full Article
ios Electrochemistry-enabled Rh-catalyzed regioselective [4 + 1] and [4 + 2] cycloaddition of benzoic acid with alkynyl esters/amides By pubs.rsc.org Published On :: Green Chem., 2024, 26,10996-11002DOI: 10.1039/D4GC03753G, PaperWei-Jung Chiu, Chung-Ming SunThe reaction of benzoic acids with alkynyl esters/amides in the presence of a Rh-catalyst and AcOH as an additive to give phthalides by [4 + 1] annulation. In contrast, the additive NaOAc exclusively affords isocoumarins through the [4 + 2] pathway.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios Substrate-controlled regioselective hydrophosphorylation of allenes to enable photocatalytic synthesis of alkenylphosphoryl compounds By pubs.rsc.org Published On :: Green Chem., 2024, 26,11272-11279DOI: 10.1039/D4GC03588G, PaperTian-Ming Yang, Xin-Lu Fan, Wei Shi, Xuefei Zhao, Xu-Hong HuA visible-light-induced hydrophosphorylation of allenes with H-phosphine oxides is demonstrated to give a diverse range of alkenylphosphoryl compounds in a highly stereoselective and regioselective manner.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios A green and sustainable multi-enzyme cascade for the biosynthesis of 1,3-propanediamine from crude glycerol in vitro By pubs.rsc.org Published On :: Green Chem., 2024, Advance ArticleDOI: 10.1039/D4GC03777D, PaperDaocheng Liao, Shiming Tang, Ying Lin, Suiping ZhengThis paper designs a novel multi-enzyme cascade reaction capable of efficiently synthesizing 1,3-propanediamine from glycerol in vitro.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry Full Article
ios iOS developer By jobs.monsterindia.com Published On :: 2020-05-10 14:22:42 Company: IndscopeExperience: 2 to 4Salary: 3.00 to 4.20location: Bengaluru / BangaloreRef: 24828923Summary: 2-3 years of iOS application development, with extensive use of Obj-C (or Swift) IO, collections, algorithms, and well-known application frameworks Full Article
ios AIFF looks to foreign hand and feet to make PIOs and OCIs eligible By indianexpress.com Published On :: Sat, 09 May 2020 18:08:54 +0000 Full Article Football Sports
ios Jackie Trad resigns as Queensland's Deputy Premier and Treasurer, Steven Miles and Cameron Dick to take on portfolios - ABC News By news.google.com Published On :: Sun, 10 May 2020 03:35:00 GMT Jackie Trad resigns as Queensland's Deputy Premier and Treasurer, Steven Miles and Cameron Dick to take on portfolios ABC NewsPoster girl’s fall a shock for the left of politics The AustralianCorruption investigation into Queensland Deputy Premier Jackie Trad has potential to unravel Labor Government's five-year reign ABC NewsEditorial: Premier, Queensland needs a new treasurer now Courier MailAnalysis: Latest investigation not a good look for Jackie Trad Courier MailView Full coverage on Google News Full Article
ios HelixStudios: Hayden Lee and Kane Fox By feeds.queerclick.com Published On :: Sun, 10 May 2020 04:06:26 +0000 Brooding bad ass, Kane Fox is absolute fire as he drowns in twink superstar, Hayden Lee’s hot kisses. He envelops the boy’s body while tasting every inch of his tight, twink torso while massaging his piece over his pants. Once he’s teased Lee to the limit, the boy turns the tables, unzipping the jock’s jeans... View Article The post HelixStudios: Hayden Lee and Kane Fox appeared first on QueerClick. Full Article Porn Site Updates Hayden Lee HelixStudios Kane Fox
ios Electronic Arts Drops Prices on iOS and Android Games By labnol.tumblr.com Published On :: Fri, 25 Nov 2011 14:01:12 +0530 Electronic Arts Drops Prices on iOS and Android Games Full Article
ios Inhibition of glycosphingolipid biosynthesis reverts multidrug resistance by differentially modulating ABC transporters in chronic myeloid leukemias [Cell Biology] By feedproxy.google.com Published On :: 2020-05-08T03:41:14-07:00 Multidrug resistance (MDR) in cancer arises from cross-resistance to structurally- and functionally-divergent chemotherapeutic drugs. In particular, MDR is characterized by increased expression and activity of ATP-binding cassette (ABC) superfamily transporters. Sphingolipids are substrates of ABC proteins in cell signaling, membrane biosynthesis, and inflammation, for example, and their products can favor cancer progression. Glucosylceramide (GlcCer) is a ubiquitous glycosphingolipid (GSL) generated by glucosylceramide synthase, a key regulatory enzyme encoded by the UDP-glucose ceramide glucosyltransferase (UGCG) gene. Stressed cells increase de novo biosynthesis of ceramides, which return to sub-toxic levels after UGCG mediates incorporation into GlcCer. Given that cancer cells seem to mobilize UGCG and have increased GSL content for ceramide clearance, which ultimately contributes to chemotherapy failure, here we investigated how inhibition of GSL biosynthesis affects the MDR phenotype of chronic myeloid leukemias. We found that MDR is associated with higher UGCG expression and with a complex GSL profile. UGCG inhibition with the ceramide analog d-threo-1-(3,4,-ethylenedioxy)phenyl-2-palmitoylamino-3-pyrrolidino-1-propanol (EtDO-P4) greatly reduced GSL and monosialotetrahexosylganglioside levels, and co-treatment with standard chemotherapeutics sensitized cells to mitochondrial membrane potential loss and apoptosis. ABC subfamily B member 1 (ABCB1) expression was reduced, and ABCC-mediated efflux activity was modulated by competition with nonglycosylated ceramides. Consistently, inhibition of ABCC-mediated transport reduced the efflux of exogenous C6-ceramide. Overall, UGCG inhibition impaired the malignant glycophenotype of MDR leukemias, which typically overcomes drug resistance through distinct mechanisms. This work sheds light on the involvement of GSL in chemotherapy failure, and its findings suggest that targeted GSL modulation could help manage MDR leukemias. Full Article
ios Endorepellin evokes an angiostatic stress signaling cascade in endothelial cells [Glycobiology and Extracellular Matrices] By feedproxy.google.com Published On :: 2020-05-08T03:41:14-07:00 Endorepellin, the C-terminal fragment of the heparan sulfate proteoglycan perlecan, influences various signaling pathways in endothelial cells by binding to VEGFR2. In this study, we discovered that soluble endorepellin activates the canonical stress signaling pathway consisting of PERK, eIF2α, ATF4, and GADD45α. Specifically, endorepellin evoked transient activation of VEGFR2, which, in turn, phosphorylated PERK at Thr980. Subsequently, PERK phosphorylated eIF2α at Ser51, upregulating its downstream effector proteins ATF4 and GADD45α. RNAi-mediated knockdown of PERK or eIF2α abrogated the endorepellin-mediated up-regulation of GADD45α, the ultimate effector protein of this stress signaling cascade. To functionally validate these findings, we utilized an ex vivo model of angiogenesis. Exposure of the aortic rings embedded in 3D fibrillar collagen to recombinant endorepellin for 2–4 h activated PERK and induced GADD45α vis à vis vehicle-treated counterparts. Similar effects were obtained with the established cellular stress inducer tunicamycin. Notably, chronic exposure of aortic rings to endorepellin for 7–9 days markedly suppressed vessel sprouting, an angiostatic effect that was rescued by blocking PERK kinase activity. Our findings unravel a mechanism by which an extracellular matrix protein evokes stress signaling in endothelial cells, which leads to angiostasis. Full Article